./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:20:20,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:20:20,193 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:20:20,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:20:20,199 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:20:20,223 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:20:20,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:20:20,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:20:20,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:20:20,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:20:20,226 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:20:20,227 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:20:20,227 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:20:20,228 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:20:20,228 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:20:20,229 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:20:20,229 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:20:20,230 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:20:20,230 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:20:20,231 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:20:20,231 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:20:20,232 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:20:20,233 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:20:20,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:20:20,233 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:20:20,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:20:20,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:20:20,234 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:20:20,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:20:20,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:20:20,236 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:20:20,236 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:20:20,236 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:20:20,236 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:20:20,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:20:20,237 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:20:20,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:20:20,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:20:20,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:20:20,238 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:20:20,238 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:20:20,238 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:20:20,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:20:20,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:20:20,239 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:20:20,239 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:20:20,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:20:20,240 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5bbf318bd4a4e295f88f23f80bb9f32022c2eeb214e815b87206f6eafbbf272 [2023-12-02 13:20:20,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:20:20,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:20:20,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:20:20,488 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:20:20,489 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:20:20,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2023-12-02 13:20:23,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:20:23,440 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:20:23,440 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2023-12-02 13:20:23,455 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/data/39680efbb/58740281dacd4ff8b8dd60670b24a1fe/FLAGd09794b5b [2023-12-02 13:20:23,467 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/data/39680efbb/58740281dacd4ff8b8dd60670b24a1fe [2023-12-02 13:20:23,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:20:23,471 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:20:23,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:20:23,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:20:23,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:20:23,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a7cc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23, skipping insertion in model container [2023-12-02 13:20:23,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,528 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:20:23,651 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2023-12-02 13:20:23,694 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2023-12-02 13:20:23,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:20:23,769 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:20:23,779 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[913,926] [2023-12-02 13:20:23,795 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-1.c[5977,5990] [2023-12-02 13:20:23,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:20:23,848 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:20:23,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23 WrapperNode [2023-12-02 13:20:23,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:20:23,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:20:23,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:20:23,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:20:23,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,866 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,905 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 665 [2023-12-02 13:20:23,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:20:23,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:20:23,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:20:23,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:20:23,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,921 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,921 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,932 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:20:23,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:20:23,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:20:23,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:20:23,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (1/1) ... [2023-12-02 13:20:23,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:20:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:23,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:20:24,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:20:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:20:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 13:20:24,032 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 13:20:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-02 13:20:24,032 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-02 13:20:24,033 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 13:20:24,033 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 13:20:24,033 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 13:20:24,033 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 13:20:24,033 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 13:20:24,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 13:20:24,033 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 13:20:24,034 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 13:20:24,034 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 13:20:24,034 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 13:20:24,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:20:24,034 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 13:20:24,034 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 13:20:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:20:24,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:20:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 13:20:24,035 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 13:20:24,155 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:20:24,157 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:20:24,672 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:20:24,940 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:20:24,940 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-12-02 13:20:24,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:20:24 BoogieIcfgContainer [2023-12-02 13:20:24,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:20:24,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:20:24,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:20:24,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:20:24,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:20:23" (1/3) ... [2023-12-02 13:20:24,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608e5c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:20:24, skipping insertion in model container [2023-12-02 13:20:24,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:23" (2/3) ... [2023-12-02 13:20:24,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608e5c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:20:24, skipping insertion in model container [2023-12-02 13:20:24,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:20:24" (3/3) ... [2023-12-02 13:20:24,949 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-1.c [2023-12-02 13:20:24,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:20:24,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 13:20:25,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:20:25,025 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1748dfc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:20:25,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 13:20:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 131 states have (on average 1.5190839694656488) internal successors, (199), 136 states have internal predecessors, (199), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 13:20:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:20:25,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:25,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:25,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:25,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash -555480241, now seen corresponding path program 1 times [2023-12-02 13:20:25,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:25,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854206894] [2023-12-02 13:20:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:25,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:25,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:25,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854206894] [2023-12-02 13:20:25,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854206894] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:25,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:25,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:25,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493634815] [2023-12-02 13:20:25,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:25,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:25,371 INFO L87 Difference]: Start difference. First operand has 168 states, 131 states have (on average 1.5190839694656488) internal successors, (199), 136 states have internal predecessors, (199), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:20:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:25,524 INFO L93 Difference]: Finished difference Result 369 states and 546 transitions. [2023-12-02 13:20:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 13:20:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:25,536 INFO L225 Difference]: With dead ends: 369 [2023-12-02 13:20:25,536 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 13:20:25,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:25,544 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 216 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:25,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 266 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 13:20:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2023-12-02 13:20:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 157 states have (on average 1.4394904458598725) internal successors, (226), 160 states have internal predecessors, (226), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-02 13:20:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 280 transitions. [2023-12-02 13:20:25,604 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 280 transitions. Word has length 28 [2023-12-02 13:20:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:25,605 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 280 transitions. [2023-12-02 13:20:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:20:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 280 transitions. [2023-12-02 13:20:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:20:25,608 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:25,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:20:25,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:25,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1342113907, now seen corresponding path program 1 times [2023-12-02 13:20:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:25,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238769411] [2023-12-02 13:20:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:25,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:25,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238769411] [2023-12-02 13:20:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238769411] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:25,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820950310] [2023-12-02 13:20:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:25,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:25,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:25,679 INFO L87 Difference]: Start difference. First operand 197 states and 280 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:20:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:25,771 INFO L93 Difference]: Finished difference Result 353 states and 497 transitions. [2023-12-02 13:20:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 13:20:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:25,775 INFO L225 Difference]: With dead ends: 353 [2023-12-02 13:20:25,775 INFO L226 Difference]: Without dead ends: 272 [2023-12-02 13:20:25,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:25,777 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 214 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:25,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 250 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-12-02 13:20:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2023-12-02 13:20:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 217 states have (on average 1.4147465437788018) internal successors, (307), 220 states have internal predecessors, (307), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-02 13:20:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 375 transitions. [2023-12-02 13:20:25,810 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 375 transitions. Word has length 29 [2023-12-02 13:20:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:25,811 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 375 transitions. [2023-12-02 13:20:25,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:20:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 375 transitions. [2023-12-02 13:20:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:20:25,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:25,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:25,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:20:25,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:25,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1889229290, now seen corresponding path program 1 times [2023-12-02 13:20:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:25,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724482035] [2023-12-02 13:20:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:25,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:25,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724482035] [2023-12-02 13:20:25,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724482035] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:25,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:25,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613663727] [2023-12-02 13:20:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:25,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:25,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:25,869 INFO L87 Difference]: Start difference. First operand 268 states and 375 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:20:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:25,985 INFO L93 Difference]: Finished difference Result 508 states and 703 transitions. [2023-12-02 13:20:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 13:20:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:25,989 INFO L225 Difference]: With dead ends: 508 [2023-12-02 13:20:25,989 INFO L226 Difference]: Without dead ends: 356 [2023-12-02 13:20:25,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:25,991 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 46 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:25,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 391 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-12-02 13:20:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 342. [2023-12-02 13:20:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 280 states have (on average 1.4) internal successors, (392), 285 states have internal predecessors, (392), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 13:20:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 472 transitions. [2023-12-02 13:20:26,020 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 472 transitions. Word has length 30 [2023-12-02 13:20:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:26,021 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 472 transitions. [2023-12-02 13:20:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:20:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 472 transitions. [2023-12-02 13:20:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 13:20:26,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:26,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:20:26,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:26,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash -388686911, now seen corresponding path program 1 times [2023-12-02 13:20:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:26,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898202162] [2023-12-02 13:20:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:20:26,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898202162] [2023-12-02 13:20:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898202162] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:26,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:26,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917513359] [2023-12-02 13:20:26,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:26,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:26,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:26,105 INFO L87 Difference]: Start difference. First operand 342 states and 472 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:20:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:26,204 INFO L93 Difference]: Finished difference Result 505 states and 690 transitions. [2023-12-02 13:20:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-12-02 13:20:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:26,208 INFO L225 Difference]: With dead ends: 505 [2023-12-02 13:20:26,208 INFO L226 Difference]: Without dead ends: 347 [2023-12-02 13:20:26,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:26,210 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 32 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:26,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 425 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-12-02 13:20:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 336. [2023-12-02 13:20:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 274 states have (on average 1.3795620437956204) internal successors, (378), 279 states have internal predecessors, (378), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 13:20:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 458 transitions. [2023-12-02 13:20:26,231 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 458 transitions. Word has length 43 [2023-12-02 13:20:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:26,231 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 458 transitions. [2023-12-02 13:20:26,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:20:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 458 transitions. [2023-12-02 13:20:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 13:20:26,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:26,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:20:26,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:26,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 582496780, now seen corresponding path program 1 times [2023-12-02 13:20:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159298541] [2023-12-02 13:20:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:26,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:26,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159298541] [2023-12-02 13:20:26,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159298541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:26,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:26,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:20:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455237063] [2023-12-02 13:20:26,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:26,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:20:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:20:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:20:26,355 INFO L87 Difference]: Start difference. First operand 336 states and 458 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:20:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:26,950 INFO L93 Difference]: Finished difference Result 859 states and 1268 transitions. [2023-12-02 13:20:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:20:26,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-12-02 13:20:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:26,958 INFO L225 Difference]: With dead ends: 859 [2023-12-02 13:20:26,958 INFO L226 Difference]: Without dead ends: 749 [2023-12-02 13:20:26,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:20:26,960 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 811 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:26,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 771 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:20:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-12-02 13:20:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 738. [2023-12-02 13:20:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 595 states have (on average 1.4050420168067226) internal successors, (836), 603 states have internal predecessors, (836), 98 states have call successors, (98), 44 states have call predecessors, (98), 43 states have return successors, (130), 91 states have call predecessors, (130), 96 states have call successors, (130) [2023-12-02 13:20:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1064 transitions. [2023-12-02 13:20:27,022 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1064 transitions. Word has length 46 [2023-12-02 13:20:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:27,022 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1064 transitions. [2023-12-02 13:20:27,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:20:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1064 transitions. [2023-12-02 13:20:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 13:20:27,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:27,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:27,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:20:27,025 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:27,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1680753989, now seen corresponding path program 1 times [2023-12-02 13:20:27,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:27,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534580647] [2023-12-02 13:20:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:27,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 13:20:27,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534580647] [2023-12-02 13:20:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534580647] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:27,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:27,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:27,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384561842] [2023-12-02 13:20:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:27,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:27,075 INFO L87 Difference]: Start difference. First operand 738 states and 1064 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:20:27,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:27,181 INFO L93 Difference]: Finished difference Result 987 states and 1388 transitions. [2023-12-02 13:20:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:27,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-12-02 13:20:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:27,188 INFO L225 Difference]: With dead ends: 987 [2023-12-02 13:20:27,188 INFO L226 Difference]: Without dead ends: 784 [2023-12-02 13:20:27,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:27,190 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 200 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:27,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 249 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2023-12-02 13:20:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2023-12-02 13:20:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 634 states have (on average 1.386435331230284) internal successors, (879), 642 states have internal predecessors, (879), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (134), 95 states have call predecessors, (134), 100 states have call successors, (134) [2023-12-02 13:20:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1115 transitions. [2023-12-02 13:20:27,253 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1115 transitions. Word has length 46 [2023-12-02 13:20:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1115 transitions. [2023-12-02 13:20:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:20:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1115 transitions. [2023-12-02 13:20:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 13:20:27,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:27,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:20:27,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:27,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1934314841, now seen corresponding path program 1 times [2023-12-02 13:20:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563153469] [2023-12-02 13:20:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:20:27,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563153469] [2023-12-02 13:20:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563153469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:27,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:27,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:20:27,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347466605] [2023-12-02 13:20:27,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:27,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:27,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:20:27,342 INFO L87 Difference]: Start difference. First operand 784 states and 1115 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:20:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:27,555 INFO L93 Difference]: Finished difference Result 824 states and 1162 transitions. [2023-12-02 13:20:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:20:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-12-02 13:20:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:27,561 INFO L225 Difference]: With dead ends: 824 [2023-12-02 13:20:27,561 INFO L226 Difference]: Without dead ends: 821 [2023-12-02 13:20:27,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:20:27,563 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 372 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:27,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 248 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-12-02 13:20:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 783. [2023-12-02 13:20:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 634 states have (on average 1.3832807570977919) internal successors, (877), 641 states have internal predecessors, (877), 101 states have call successors, (101), 47 states have call predecessors, (101), 46 states have return successors, (134), 95 states have call predecessors, (134), 100 states have call successors, (134) [2023-12-02 13:20:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1112 transitions. [2023-12-02 13:20:27,627 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1112 transitions. Word has length 47 [2023-12-02 13:20:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:27,628 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1112 transitions. [2023-12-02 13:20:27,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:20:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1112 transitions. [2023-12-02 13:20:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 13:20:27,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:27,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:27,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:20:27,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:27,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 164896776, now seen corresponding path program 1 times [2023-12-02 13:20:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:27,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921027960] [2023-12-02 13:20:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:27,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:20:27,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921027960] [2023-12-02 13:20:27,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921027960] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337377798] [2023-12-02 13:20:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:27,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:27,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:27,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:20:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:27,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:20:27,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:20:28,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:20:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:20:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337377798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:20:28,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793044170] [2023-12-02 13:20:28,203 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 13:20:28,203 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:20:28,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:20:28,212 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:20:28,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:20:32,505 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 111 for LOIs [2023-12-02 13:20:32,529 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 136 for LOIs [2023-12-02 13:20:32,571 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 122 for LOIs [2023-12-02 13:20:34,323 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:20:49,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10453#(and (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (not (= ~p_num_write~0 1)) (= ~T4_E~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)) (not (= 0 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)))) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))' at error location [2023-12-02 13:20:49,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:20:49,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:20:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 13:20:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491506503] [2023-12-02 13:20:49,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:20:49,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:20:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:20:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:20:49,346 INFO L87 Difference]: Start difference. First operand 783 states and 1112 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:20:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:49,654 INFO L93 Difference]: Finished difference Result 1226 states and 1680 transitions. [2023-12-02 13:20:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:20:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2023-12-02 13:20:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:49,663 INFO L225 Difference]: With dead ends: 1226 [2023-12-02 13:20:49,663 INFO L226 Difference]: Without dead ends: 1223 [2023-12-02 13:20:49,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:20:49,665 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 349 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:49,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 786 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:20:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2023-12-02 13:20:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 992. [2023-12-02 13:20:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 811 states have (on average 1.3686806411837238) internal successors, (1110), 820 states have internal predecessors, (1110), 120 states have call successors, (120), 60 states have call predecessors, (120), 59 states have return successors, (153), 112 states have call predecessors, (153), 119 states have call successors, (153) [2023-12-02 13:20:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1383 transitions. [2023-12-02 13:20:49,749 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1383 transitions. Word has length 48 [2023-12-02 13:20:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:49,749 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1383 transitions. [2023-12-02 13:20:49,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 13:20:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1383 transitions. [2023-12-02 13:20:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 13:20:49,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:49,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:49,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:20:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:49,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:49,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash -669031248, now seen corresponding path program 2 times [2023-12-02 13:20:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:49,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125369710] [2023-12-02 13:20:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:49,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:20:49,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:49,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125369710] [2023-12-02 13:20:49,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125369710] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:49,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:49,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590170730] [2023-12-02 13:20:49,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:49,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:49,997 INFO L87 Difference]: Start difference. First operand 992 states and 1383 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:20:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:50,114 INFO L93 Difference]: Finished difference Result 1322 states and 1816 transitions. [2023-12-02 13:20:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:50,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2023-12-02 13:20:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:50,121 INFO L225 Difference]: With dead ends: 1322 [2023-12-02 13:20:50,121 INFO L226 Difference]: Without dead ends: 934 [2023-12-02 13:20:50,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:50,123 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 213 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:50,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 265 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2023-12-02 13:20:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 925. [2023-12-02 13:20:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 754 states have (on average 1.3647214854111407) internal successors, (1029), 764 states have internal predecessors, (1029), 114 states have call successors, (114), 56 states have call predecessors, (114), 55 states have return successors, (147), 105 states have call predecessors, (147), 113 states have call successors, (147) [2023-12-02 13:20:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1290 transitions. [2023-12-02 13:20:50,210 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1290 transitions. Word has length 61 [2023-12-02 13:20:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:50,210 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1290 transitions. [2023-12-02 13:20:50,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:20:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1290 transitions. [2023-12-02 13:20:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 13:20:50,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:50,213 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:50,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:20:50,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:50,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:50,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2061663341, now seen corresponding path program 1 times [2023-12-02 13:20:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:50,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794773575] [2023-12-02 13:20:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:50,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:20:50,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:50,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794773575] [2023-12-02 13:20:50,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794773575] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:50,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677339790] [2023-12-02 13:20:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:50,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:50,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:50,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:20:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:50,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:20:50,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:20:50,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677339790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:50,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:50,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:20:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409688478] [2023-12-02 13:20:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:50,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:50,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:50,495 INFO L87 Difference]: Start difference. First operand 925 states and 1290 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:20:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:50,592 INFO L93 Difference]: Finished difference Result 1052 states and 1449 transitions. [2023-12-02 13:20:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-12-02 13:20:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:50,595 INFO L225 Difference]: With dead ends: 1052 [2023-12-02 13:20:50,596 INFO L226 Difference]: Without dead ends: 518 [2023-12-02 13:20:50,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:50,598 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 25 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:50,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 396 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-12-02 13:20:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 518. [2023-12-02 13:20:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 411 states have (on average 1.4282238442822384) internal successors, (587), 415 states have internal predecessors, (587), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (110), 73 states have call predecessors, (110), 76 states have call successors, (110) [2023-12-02 13:20:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 773 transitions. [2023-12-02 13:20:50,627 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 773 transitions. Word has length 73 [2023-12-02 13:20:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:50,628 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 773 transitions. [2023-12-02 13:20:50,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:20:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 773 transitions. [2023-12-02 13:20:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 13:20:50,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:50,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:50,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:20:50,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:20:50,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:50,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:50,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1634061366, now seen corresponding path program 1 times [2023-12-02 13:20:50,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:50,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451667968] [2023-12-02 13:20:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:50,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:20:50,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451667968] [2023-12-02 13:20:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451667968] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384656846] [2023-12-02 13:20:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:50,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:50,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:50,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:50,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:20:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:51,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:20:51,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:20:51,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:51,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384656846] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:51,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:51,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:20:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234481359] [2023-12-02 13:20:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:51,125 INFO L87 Difference]: Start difference. First operand 518 states and 773 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:20:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:51,267 INFO L93 Difference]: Finished difference Result 1526 states and 2338 transitions. [2023-12-02 13:20:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-12-02 13:20:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:51,275 INFO L225 Difference]: With dead ends: 1526 [2023-12-02 13:20:51,275 INFO L226 Difference]: Without dead ends: 1014 [2023-12-02 13:20:51,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:51,279 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 139 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:51,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 263 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-12-02 13:20:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1007. [2023-12-02 13:20:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 803 states have (on average 1.419676214196762) internal successors, (1140), 810 states have internal predecessors, (1140), 143 states have call successors, (143), 60 states have call predecessors, (143), 60 states have return successors, (207), 137 states have call predecessors, (207), 143 states have call successors, (207) [2023-12-02 13:20:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1490 transitions. [2023-12-02 13:20:51,364 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1490 transitions. Word has length 88 [2023-12-02 13:20:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:51,364 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1490 transitions. [2023-12-02 13:20:51,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:20:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1490 transitions. [2023-12-02 13:20:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 13:20:51,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:51,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:51,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:20:51,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:51,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:51,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1122726280, now seen corresponding path program 1 times [2023-12-02 13:20:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:51,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367368692] [2023-12-02 13:20:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:20:51,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:51,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367368692] [2023-12-02 13:20:51,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367368692] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:51,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734475459] [2023-12-02 13:20:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:51,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:51,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:20:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:51,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:20:51,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:20:51,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734475459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:51,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:51,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:20:51,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047223967] [2023-12-02 13:20:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:51,849 INFO L87 Difference]: Start difference. First operand 1007 states and 1490 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:20:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:52,064 INFO L93 Difference]: Finished difference Result 2978 states and 4518 transitions. [2023-12-02 13:20:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-12-02 13:20:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:52,077 INFO L225 Difference]: With dead ends: 2978 [2023-12-02 13:20:52,077 INFO L226 Difference]: Without dead ends: 1977 [2023-12-02 13:20:52,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:52,082 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 133 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:52,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 263 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-12-02 13:20:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1965. [2023-12-02 13:20:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1572 states have (on average 1.4096692111959288) internal successors, (2216), 1585 states have internal predecessors, (2216), 272 states have call successors, (272), 120 states have call predecessors, (272), 120 states have return successors, (392), 260 states have call predecessors, (392), 272 states have call successors, (392) [2023-12-02 13:20:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2880 transitions. [2023-12-02 13:20:52,238 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2880 transitions. Word has length 88 [2023-12-02 13:20:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:52,238 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2880 transitions. [2023-12-02 13:20:52,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:20:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2880 transitions. [2023-12-02 13:20:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 13:20:52,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:52,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:52,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:20:52,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:52,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:52,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -713730618, now seen corresponding path program 1 times [2023-12-02 13:20:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:52,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429127435] [2023-12-02 13:20:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:52,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:20:52,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429127435] [2023-12-02 13:20:52,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429127435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:52,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:52,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:52,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572348959] [2023-12-02 13:20:52,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:52,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:52,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:52,530 INFO L87 Difference]: Start difference. First operand 1965 states and 2880 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 13:20:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:52,757 INFO L93 Difference]: Finished difference Result 4007 states and 5993 transitions. [2023-12-02 13:20:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2023-12-02 13:20:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:52,776 INFO L225 Difference]: With dead ends: 4007 [2023-12-02 13:20:52,776 INFO L226 Difference]: Without dead ends: 2437 [2023-12-02 13:20:52,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:52,783 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 70 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:52,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 353 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2023-12-02 13:20:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2257. [2023-12-02 13:20:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 1848 states have (on average 1.4350649350649352) internal successors, (2652), 1861 states have internal predecessors, (2652), 280 states have call successors, (280), 128 states have call predecessors, (280), 128 states have return successors, (400), 268 states have call predecessors, (400), 280 states have call successors, (400) [2023-12-02 13:20:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3332 transitions. [2023-12-02 13:20:52,976 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3332 transitions. Word has length 88 [2023-12-02 13:20:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:52,976 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3332 transitions. [2023-12-02 13:20:52,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 13:20:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3332 transitions. [2023-12-02 13:20:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 13:20:52,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:52,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:52,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 13:20:52,985 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:52,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1194823734, now seen corresponding path program 1 times [2023-12-02 13:20:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:52,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699572106] [2023-12-02 13:20:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 13:20:53,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699572106] [2023-12-02 13:20:53,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699572106] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:53,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:53,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:53,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137591269] [2023-12-02 13:20:53,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:53,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:53,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:53,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:53,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:53,060 INFO L87 Difference]: Start difference. First operand 2257 states and 3332 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:20:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:53,393 INFO L93 Difference]: Finished difference Result 6670 states and 10037 transitions. [2023-12-02 13:20:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:53,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-12-02 13:20:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:53,415 INFO L225 Difference]: With dead ends: 6670 [2023-12-02 13:20:53,415 INFO L226 Difference]: Without dead ends: 4419 [2023-12-02 13:20:53,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:53,423 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 132 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:53,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 265 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4419 states. [2023-12-02 13:20:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4419 to 4389. [2023-12-02 13:20:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 3596 states have (on average 1.4204671857619577) internal successors, (5108), 3621 states have internal predecessors, (5108), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2023-12-02 13:20:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 6404 transitions. [2023-12-02 13:20:53,662 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 6404 transitions. Word has length 118 [2023-12-02 13:20:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:53,663 INFO L495 AbstractCegarLoop]: Abstraction has 4389 states and 6404 transitions. [2023-12-02 13:20:53,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:20:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 6404 transitions. [2023-12-02 13:20:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 13:20:53,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:53,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:53,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 13:20:53,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:53,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:53,675 INFO L85 PathProgramCache]: Analyzing trace with hash 52776216, now seen corresponding path program 1 times [2023-12-02 13:20:53,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:53,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935356625] [2023-12-02 13:20:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 13:20:53,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:53,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935356625] [2023-12-02 13:20:53,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935356625] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:53,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:53,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241714455] [2023-12-02 13:20:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:53,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:53,729 INFO L87 Difference]: Start difference. First operand 4389 states and 6404 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:20:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:54,190 INFO L93 Difference]: Finished difference Result 12978 states and 19277 transitions. [2023-12-02 13:20:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-12-02 13:20:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:54,233 INFO L225 Difference]: With dead ends: 12978 [2023-12-02 13:20:54,233 INFO L226 Difference]: Without dead ends: 8595 [2023-12-02 13:20:54,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:54,250 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 134 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:54,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 269 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2023-12-02 13:20:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 8537. [2023-12-02 13:20:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8537 states, 6996 states have (on average 1.4048027444253859) internal successors, (9828), 7045 states have internal predecessors, (9828), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2023-12-02 13:20:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8537 states to 8537 states and 12300 transitions. [2023-12-02 13:20:54,740 INFO L78 Accepts]: Start accepts. Automaton has 8537 states and 12300 transitions. Word has length 118 [2023-12-02 13:20:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:54,740 INFO L495 AbstractCegarLoop]: Abstraction has 8537 states and 12300 transitions. [2023-12-02 13:20:54,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:20:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 8537 states and 12300 transitions. [2023-12-02 13:20:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:20:54,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:54,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 13:20:54,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:54,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1133309706, now seen corresponding path program 1 times [2023-12-02 13:20:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186479577] [2023-12-02 13:20:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 13:20:54,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186479577] [2023-12-02 13:20:54,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186479577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677016109] [2023-12-02 13:20:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:54,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:54,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:54,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:54,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:20:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:55,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:20:55,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:20:55,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677016109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:55,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:20:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937893133] [2023-12-02 13:20:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:55,107 INFO L87 Difference]: Start difference. First operand 8537 states and 12300 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:20:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:55,646 INFO L93 Difference]: Finished difference Result 15636 states and 22593 transitions. [2023-12-02 13:20:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-12-02 13:20:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:55,692 INFO L225 Difference]: With dead ends: 15636 [2023-12-02 13:20:55,693 INFO L226 Difference]: Without dead ends: 10594 [2023-12-02 13:20:55,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:55,716 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 126 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:55,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 190 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2023-12-02 13:20:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10594. [2023-12-02 13:20:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10594 states, 8818 states have (on average 1.371966432297573) internal successors, (12098), 8867 states have internal predecessors, (12098), 1105 states have call successors, (1105), 669 states have call predecessors, (1105), 670 states have return successors, (1583), 1058 states have call predecessors, (1583), 1105 states have call successors, (1583) [2023-12-02 13:20:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10594 states to 10594 states and 14786 transitions. [2023-12-02 13:20:56,460 INFO L78 Accepts]: Start accepts. Automaton has 10594 states and 14786 transitions. Word has length 138 [2023-12-02 13:20:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:56,461 INFO L495 AbstractCegarLoop]: Abstraction has 10594 states and 14786 transitions. [2023-12-02 13:20:56,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:20:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 10594 states and 14786 transitions. [2023-12-02 13:20:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:20:56,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:56,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:56,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:20:56,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:56,683 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:56,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -443248053, now seen corresponding path program 1 times [2023-12-02 13:20:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:56,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815340648] [2023-12-02 13:20:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 13:20:56,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815340648] [2023-12-02 13:20:56,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815340648] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123294744] [2023-12-02 13:20:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:56,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:20:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:56,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:20:56,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 13:20:57,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123294744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:57,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:20:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573646785] [2023-12-02 13:20:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:57,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:57,002 INFO L87 Difference]: Start difference. First operand 10594 states and 14786 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:20:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:57,635 INFO L93 Difference]: Finished difference Result 20215 states and 28608 transitions. [2023-12-02 13:20:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 138 [2023-12-02 13:20:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:57,670 INFO L225 Difference]: With dead ends: 20215 [2023-12-02 13:20:57,670 INFO L226 Difference]: Without dead ends: 14809 [2023-12-02 13:20:57,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:57,684 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 101 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:57,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 380 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:20:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2023-12-02 13:20:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 12334. [2023-12-02 13:20:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12334 states, 10446 states have (on average 1.3970897951368946) internal successors, (14594), 10495 states have internal predecessors, (14594), 1161 states have call successors, (1161), 725 states have call predecessors, (1161), 726 states have return successors, (1639), 1114 states have call predecessors, (1639), 1161 states have call successors, (1639) [2023-12-02 13:20:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12334 states to 12334 states and 17394 transitions. [2023-12-02 13:20:58,341 INFO L78 Accepts]: Start accepts. Automaton has 12334 states and 17394 transitions. Word has length 138 [2023-12-02 13:20:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:58,341 INFO L495 AbstractCegarLoop]: Abstraction has 12334 states and 17394 transitions. [2023-12-02 13:20:58,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:20:58,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12334 states and 17394 transitions. [2023-12-02 13:20:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:20:58,361 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:58,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:20:58,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:20:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:20:58,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1946362035, now seen corresponding path program 2 times [2023-12-02 13:20:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410898191] [2023-12-02 13:20:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 13:20:58,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410898191] [2023-12-02 13:20:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410898191] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799588715] [2023-12-02 13:20:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:20:58,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:58,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:58,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:58,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:20:58,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:20:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:20:58,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:20:58,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:20:58,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:58,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799588715] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:58,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:58,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 13:20:58,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821008133] [2023-12-02 13:20:58,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:58,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:20:58,951 INFO L87 Difference]: Start difference. First operand 12334 states and 17394 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:21:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:00,167 INFO L93 Difference]: Finished difference Result 36356 states and 51191 transitions. [2023-12-02 13:21:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:21:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 138 [2023-12-02 13:21:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:00,228 INFO L225 Difference]: With dead ends: 36356 [2023-12-02 13:21:00,228 INFO L226 Difference]: Without dead ends: 24029 [2023-12-02 13:21:00,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:21:00,248 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 129 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:00,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 648 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:21:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24029 states. [2023-12-02 13:21:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24029 to 23963. [2023-12-02 13:21:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23963 states, 20229 states have (on average 1.380443917148648) internal successors, (27925), 20326 states have internal predecessors, (27925), 2284 states have call successors, (2284), 1448 states have call predecessors, (2284), 1449 states have return successors, (3366), 2189 states have call predecessors, (3366), 2284 states have call successors, (3366) [2023-12-02 13:21:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23963 states to 23963 states and 33575 transitions. [2023-12-02 13:21:01,452 INFO L78 Accepts]: Start accepts. Automaton has 23963 states and 33575 transitions. Word has length 138 [2023-12-02 13:21:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:01,452 INFO L495 AbstractCegarLoop]: Abstraction has 23963 states and 33575 transitions. [2023-12-02 13:21:01,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:21:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 23963 states and 33575 transitions. [2023-12-02 13:21:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:21:01,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:01,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:01,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 13:21:01,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:21:01,685 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:01,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash -108549012, now seen corresponding path program 2 times [2023-12-02 13:21:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:01,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424705884] [2023-12-02 13:21:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 13:21:01,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424705884] [2023-12-02 13:21:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424705884] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:21:01,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490228486] [2023-12-02 13:21:01,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:21:01,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:21:01,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:21:01,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:21:01,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27702a66-c678-49bd-bd51-62a626665278/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:21:02,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:21:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:21:02,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:21:02,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:21:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:21:02,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:21:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 13:21:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490228486] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:21:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324304495] [2023-12-02 13:21:02,512 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-12-02 13:21:02,513 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:21:02,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:21:02,513 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:21:02,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:21:14,253 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 169 for LOIs [2023-12-02 13:21:14,403 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-12-02 13:21:14,579 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2023-12-02 13:21:27,982 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2023-12-02 13:21:28,288 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-12-02 13:21:28,392 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2023-12-02 13:21:42,107 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions.